I've had four laying hens since March: a plymouth rock, a silver laced wyandotte, a buff orpington and a black australorp. We usually let them out of their run every night before dusk so they can have some supervised free-range foraging. When I let them out tonight I noticed that my girls breasts were especially pronounced. It seemed a uniform increase amongst them so I'm wondering if this is a natural physical change preparing them for winter or if I should be alarmed. I'm pretty sure I'm not imaging the increase because my wyandotte's growth is uneven, so it looks like she has a lump on her right side. Nothing in my reading/research had mentioned, "at some point hen's breast will increase", so I'm particularly puzzled as to what's going on. Any feedback would be appreciated, thanks!